Yes, the sentence is grammatically correct. It conveys the idea that the speaker has come to understand that happiness often comes with a financial cost, suggesting that the things they enjoy or that make them happy require spending money.
Here are a few possible rephrasing options:
1. "I've come to realize that happiness isn't free; everything that brings me joy seems to have a price tag."
2. "I just realized that happiness comes at a cost, as


